NSN 5331-01-521-0223 · NIIN 015210223 · Part number 371-7631
Hiab Usa Inc · FSC 5331 — O-ring · FSG 53 — Hardware and Abrasives · CAGE 34914
Government record, cited
NSN 5331-01-521-0223 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-521-0223. Manufacturer of record part number: 371-7631.
The O-Ring, cataloged under National Stock Number 5331-01-521-0223, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Hiab Usa Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5331-01-521-0223
Primary Part Number
371-7631
Item Name
O-Ring
FSC / FSG
5331 / 53 — O-ring
Manufacturer
Hiab Usa Inc
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items1
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
NSN 5331-01-521-0223 is a O-Ring, manufactured by Hiab Usa Inc, classified under FSC 5331, O-ring. Status: active.
What part numbers are listed for NSN 5331-01-521-0223?
NSN 5331-01-521-0223 has 2 manufacturer part numbers on file: 4KK578 (Oshkosh Defense Llc), 371-7631 (Hiab Usa Inc).
What NSN replaces 5331-01-521-0223?
1 possible match (shared part number, not a government interchangeability claim): 3040-01-521-6398. Verify interchangeability with system specifications before substitution.
What are the specifications of 371-7631?
Key specifications for 371-7631: Part Name Assigned by Controlling Agency: RING; End Item Identification: KOLOM COLUMN. 0 specifications are documented in the U.S. Government catalog.
Is NSN 5331-01-521-0223 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.